From 5477ee88948166f76c9ac69bc28bf8af8d8bd869 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Ekl=C3=B6f?= <daniel@ekloef.se>
Date: Fri, 9 Oct 2020 18:53:00 +0200
Subject: [PATCH] csi: only respond to Primary DA when Ps == 0

---
 CHANGELOG.md | 1 +
 csi.c        | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2b972b6b..2ab0f56e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -53,6 +53,7 @@
   (https://codeberg.org/dnkl/foot/issues/151).
 * Crash after either resizing a window or changing the font size if
   there were sixels present in the scrollback while doing so.
+* _Send Device Attributes_ to only send a response if `Ps == 0`.
 
 
 ### Security
diff --git a/csi.c b/csi.c
index 53a90805..7c4d5077 100644
--- a/csi.c
+++ b/csi.c
@@ -653,6 +653,11 @@ csi_dispatch(struct terminal *term, uint8_t final)
             break;
 
         case 'c': {
+            if (vt_param_get(term, 0, 0) != 0) {
+                UNHANDLED();
+                break;
+            }
+
             /* Send Device Attributes (Primary DA) */
 
             /*